Liftable tunnel furnace

Abstract

The utility model discloses a liftable tunnel furnace which comprises a body and an upper cover, and the upper cover is arranged above the body. The supporting assembly and the lifting assembly are both arranged between the upper cover and the body, the supporting assembly comprises a supporting base and a supporting guide column, the telescopic assembly is arranged on the supporting base and located on one side of the supporting guide column, dynamic adjustment of the height of a furnace cavity of the tunnel furnace is achieved through the lifting assembly, the adaptation capacity of equipment to materials with different thicknesses is remarkably improved, and one machine with multiple purposes is achieved; the production line remodeling cost and time are reduced; an original supporting force dynamic switching mechanism is created, on one hand, the stability and high precision of high-frequency lifting of the upper cover are guaranteed by additionally arranging the supporting assembly, and the situation that the product machining quality is affected due to position deviation in the lifting process of the upper cover is avoided; on the other hand, supporting constraint is quickly relieved during maintenance through the telescopic assembly, and the maintenance efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of tunnel furnace technology, specifically a liftable tunnel furnace. Background Technology

[0002] Tunnel ovens have a wide range of applications, suitable for baking items exposed to chemical gases and in the food processing industry, relieving substrate stress, curing inks, and drying paint films. They are widely used in precision baking, drying, tempering, preheating, shaping, and processing of electronic, electrical, communication, electroplating, plastics, hardware and chemical, food, printing, pharmaceutical, PC board, powder, impregnation, spraying, glass, ceramics, wood and building materials industries.

[0003] As intelligent manufacturing develops towards flexibility and high precision, the "multi-variety, small-batch" production mode places higher demands on the adaptability of equipment. However, traditional tunnel furnaces, due to their fixed structure, are difficult to adapt to the processing needs of multiple types of materials and suffer from problems such as inconvenient maintenance and insufficient motion precision. Therefore, it is urgent to break through the rigid limitations of traditional structures and develop a lifting tunnel furnace with high motion precision, convenient maintenance, and applicability to more product types. Utility Model Content

[0004] To address the aforementioned challenges, this utility model provides a liftable tunnel furnace, comprising a main body and a top cover, with the top cover positioned above the main body. The main body has an internal vertical guide groove. A support assembly and a lifting assembly are both located between the top cover and the main body. The support assembly includes a support base and a support guide column. The support base is positioned below the vertical guide groove and is fixedly or detachably connected to the bottom shell of the main body. The support base has a through hole for the support guide column to pass through. The support guide column is positioned below the top cover, with one end connected to the top cover and the other end extending into the vertical guide groove. The lifting assembly includes a lifting drive and a lifting component. The lifting drive is positioned at the bottom of the main body or on the support base. One end of the lifting component is connected to the drive end of the lifting drive, and the other end is connected to the bottom surface of the top cover. A telescopic assembly is positioned on the support base and located on one side of the through hole. The telescopic assembly includes a telescopic drive, a telescopic rod, and a baffle. One end of the telescopic rod is connected to the drive end of the telescopic drive, and the other end is fixedly or detachably connected to the baffle. A control assembly is electrically connected to the lifting assembly and the telescopic assembly.

[0005] Preferably, the lifting drive component is a hydraulic pump. The lifting component includes a hydraulic cylinder and a piston. The hydraulic cylinder is connected to the driving end of the hydraulic pump. The piston is located inside the hydraulic cylinder. The top of the piston is threadedly engaged with the connecting part of the bottom surface of the upper cover. The hydraulic pump drives the piston to move up and down inside the hydraulic cylinder, thereby driving the upper cover to lift.

[0006] Preferably, the lifting drive is a servo motor. The lifting component includes a lead screw and a nut seat. The nut seat is sleeved on the lead screw, and the lead screw is connected to the drive end of the lifting drive. The nut seat is fixed to the bottom surface of the upper cover via a connector. The servo motor drives the lead screw to rotate by forward and reverse rotation, causing the nut seat to move linearly on the lead screw, thereby moving the upper cover up and down.

[0007] Preferably, the lifting drive component is a double-acting cylinder, and the lifting component is a piston rod, which is fixed to the bottom surface of the upper cover via a flange.

[0008] Preferably, the lifting assembly further includes a linear guide rail and a slider. The linear guide rail is disposed on the inner wall of the cavity of the main body, and the upper cover is slidably connected to the linear guide rail through the slider.

[0009] Preferably, limit switches are provided at the top of the main body and the bottom of the top cover, and a proximity switch is provided near the through hole of the support base. Both the limit switches and the proximity switches are electrically connected to the control components.

[0010] Preferably, a support sleeve is provided between the vertical guide groove and the support guide post.

[0011] Preferably, when the top cover moves to the preset position, the part of the support guide post extending out of the guide groove is also provided with a matching support housing, which is obtained by two support half-shells working together and fastening them with fasteners.

[0012] Preferably, the upper cover is provided with a heating component, and the main body is provided with a conveying component, both of which are electrically connected to the control component.

[0013] The beneficial effects are as follows: This application utilizes lifting components to achieve dynamic adjustment of the furnace cavity height of the tunnel furnace, significantly improving the equipment's adaptability to materials of different thicknesses, realizing multi-purpose use, and reducing production line changeover costs and time; the unique dynamic switching mechanism of support force, on the one hand, ensures the stability and high precision of the high-frequency lifting of the top cover by adding support components, avoiding the impact of the top cover's positional displacement on product processing quality during the lifting process; on the other hand, it enables quick release of support constraints during maintenance through telescopic components, improving maintenance efficiency. Attached Figure Description

[0014] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a cross-sectional view of the present invention;

[0017] Figure 3This is a cross-sectional view of the assembled support component, lifting component, and telescopic component of this utility model;

[0018] In the picture:

[0019] 1. Body; 11. Vertical guide slot;

[0020] 2. Top cover;

[0021] 3. Support assembly; 31. Support base; 311. Through hole; 312. Support guide post; 313. Support sleeve; 314. Support housing;

[0022] 4. Lifting assembly; 41. Lifting drive component; 42. Lifting component;

[0023] 5. Telescopic assembly; 51. Telescopic drive component; 52. Telescopic rod; 53. Baffle. Detailed Implementation

[0024] The following drawings will disclose several embodiments of this utility model. For clarity, many practical details will be described in the following description. However, it should be understood that these practical details should not be used to limit this utility model. That is, in some embodiments of this utility model, these practical details are not essential. In addition, for the sake of simplicity, some conventional structures and components will be shown in the drawings in a simple schematic manner.

[0025] It should be noted that all directional indicators in this utility model embodiment, such as up, down, left, right, front, back, etc., are only used to explain the relative positional relationship and movement of the components in a specific posture as shown in the attached figure. If the specific posture changes, the directional indicator will also change accordingly.

[0026] Furthermore, in this utility model, the use of terms such as "first" and "second" is for descriptive purposes only and does not specifically refer to any order or sequence, nor is it intended to limit the utility model. They are merely used to distinguish components or operations described with the same technical terms and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but only if they are feasible for those skilled in the art. If a combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0027] Example

[0028] Please see Figures 1 to 3 , Figure 1This is a schematic diagram of the overall structure of this utility model. Figure 2 This is a cross-sectional view of the present invention; Figure 3 This is a cross-sectional view of the assembled support assembly, lifting assembly, and telescopic assembly of this utility model. This embodiment provides a liftable tunnel furnace, including a main body and a top cover, with the top cover positioned above the main body. A vertical guide groove is provided inside the main body. Both the support assembly and the lifting assembly are located between the top cover and the main body. At least two support assemblies and four lifting assemblies are provided, preferably distributed along the four sides of the main body. This disperses the pressure from the top cover and improves the stability of the top cover during lifting. The lifting assembly allows the top cover to move up and down relative to the main body, while the support assembly provides support to the top cover.

[0029] See also Figure 3 The support assembly includes a support base and a support guide post. The support base is located below the vertical guide groove and is fixedly or detachably connected to the bottom shell of the main body. The support base has a through hole for the support guide post to pass through. The support guide post cooperates with the vertical guide groove to ensure that the top cover does not shift during the up and down movement. A support sleeve is provided between the vertical guide groove and the support guide post to reduce wear on the support guide post. The support guide post is located below the top cover, with one end fixed to the bottom of the top cover by a flange or other connecting parts, and the other end extending into the vertical guide groove. The surface of the support guide post is coated with graphite to reduce friction and extend the maintenance cycle of the support guide post. When the top cover moves up to the preset position, the part of the support guide post extending out of the guide groove is also equipped with a matching support housing. The support housing is formed by two support half-shells that are fastened together with fasteners. This easy-to-assemble and disassemble support housing can protect the extended support guide post on the one hand, and provide support force on the other hand.

[0030] See also Figure 3The lifting assembly includes a lifting drive and a lifting component. The lifting drive is located at the bottom of the main body or on a support base. One end of the lifting component is connected to the driving end of the lifting drive, and the other end of the lifting component is connected to the bottom surface of the upper cover. The lifting assembly can use pneumatic, electric, or hydraulic methods to lift the upper cover. Specifically, the lifting drive can be a hydraulic pump, and the lifting component includes a hydraulic cylinder and a piston. The hydraulic cylinder is connected to the driving end of the hydraulic pump, and the piston is located inside the hydraulic cylinder. The top of the piston is threadedly engaged with the connecting piece of the bottom surface of the upper cover. The hydraulic pump drives the piston to move up and down inside the hydraulic cylinder, thereby lifting the upper cover. Alternatively, the lifting drive can be a servo motor, and the lifting component includes a lead screw and a nut seat. The nut seat is sleeved on the lead screw, and the lead screw is connected to the driving end of the lifting drive. The nut seat is fixed to the bottom surface of the upper cover through a connecting piece. A servo motor drives a lead screw to rotate in both forward and reverse directions, causing the nut seat to move linearly on the lead screw, thereby moving the upper cover up and down. Alternatively, a double-acting cylinder can be used as the lifting drive component, with the lifting component being a piston rod fixed to the bottom surface of the upper cover via a flange. The double-acting cylinder drives the piston rod to extend and retract, moving the upper cover up and down. The lifting assembly also includes a linear guide rail and a slider. The linear guide rail is located on the inner wall of the body cavity, and the upper cover is slidably connected to the linear guide rail via the slider. The guide rail constrains the lifting trajectory of the upper cover, ensuring smooth vertical movement. The support guide column and the linear guide rail form a composite guide, improving the accuracy of the upper cover's lifting trajectory.

[0031] See also Figure 3 The telescopic assembly is mounted on the support base and located on one side of the through hole. The telescopic assembly includes a telescopic drive component, a telescopic rod, and a baffle. One end of the telescopic rod is connected to the drive end of the telescopic drive component, and the other end of the telescopic rod is fixedly or detachably connected to the baffle. The telescopic drive component drives the telescopic rod to extend and retract, thereby moving the baffle to cover or open the through hole on the support base when needed. When the baffle covers the through hole, the support guide column is blocked by the baffle and cannot provide support force to the upper cover through the through hole. When the baffle opens the through hole, the support guide column can pass through the through hole so that the upper cover can move down. The support force is switched through the above dynamic telescopic mechanism, so that support force is provided when the tunnel furnace is working, and the support constraint can be quickly released when the tunnel furnace is being maintained.

[0032] A heating component is installed on the top cover, and a conveying component is installed on the main body; alternatively, a heating component and a conveying component can be installed on the main body, with the heating component located below the conveying component; the control component is electrically connected to the lifting component, the telescopic component, the heating component, and the conveying component.

[0033] Limit switches are provided at the top of the main body and the bottom of the cover, and a proximity switch is provided near the through hole of the support base. Both the limit switches and the proximity switch are electrically connected to the control components. The limit switches at the top of the main body and the bottom of the cover can monitor the position of the cover in real time. When the cover is raised or lowered, the limit switches are triggered to prevent mechanical collisions caused by overtravel. The proximity switch near the through hole of the support base provides feedback on the baffle status, ensuring that the support force switching is synchronized with the raising and lowering action, and avoiding misoperation.

[0034] In its initial state, the top cover is away from the main body, the baffle covers the through hole, and the support guide post is inserted into the vertical guide slot and placed on the baffle. The baffle provides support force to the support guide post, providing stable support for the top cover. Simultaneously, a support housing is fitted over the support guide post to further strengthen the support for the top cover. When the top cover needs to be lowered, the drive unit drives the lifting unit to lower the top cover. The support guide post follows the top cover down, triggering a proximity switch. The telescopic drive unit then drives the baffle to open the through hole, allowing the support guide post to pass through the through hole and reach the bottom of the main body. The lifting drive unit then stops operating. When the top cover needs to be raised, the drive unit drives the lifting unit to raise the top cover. The support guide post follows the top cover up until the top cover reaches a preset position, triggering a limit switch. The lifting drive unit stops operating, and the telescopic drive unit simultaneously drives the baffle to cover the through hole. The support guide post is then placed back on the baffle, and the support housing is fitted over the support guide post again.

[0035] This embodiment utilizes a lifting assembly to dynamically adjust the furnace cavity height of the tunnel furnace, significantly improving the equipment's adaptability to materials of different thicknesses, enabling multi-purpose use, and reducing production line changeover costs and time. A unique dynamic support force switching mechanism ensures the stability and high precision of the high-frequency lifting of the top cover by adding support components, preventing positional shifts in the top cover from affecting product processing quality. Furthermore, the telescopic assembly allows for rapid release of support constraints during maintenance, improving repair efficiency.

[0036] The above are merely embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. A vertically movable tunnel furnace, characterized in that The application relates to a lifting device, which comprises a body and an upper cover arranged above the body; a vertical guide through slot is arranged in the body; a supporting assembly and a lifting assembly are arranged between the upper cover and the body; the supporting assembly comprises a supporting base and a supporting guide column; the supporting base is arranged below the vertical guide through slot and is fixedly connected or detachably connected with the bottom shell of the body; a through hole is arranged on the supporting base for the supporting guide column to pass through; the supporting guide column is arranged below the upper cover and is connected with one end of the upper cover and extends into the vertical guide through slot; the lifting assembly comprises a lifting driving element and a lifting piece; the lifting driving element is arranged on the bottom of the body or the supporting base; one end of the lifting piece is connected with the driving end of the lifting driving element; the other end of the lifting piece is connected with the bottom surface of the upper cover; a telescopic assembly is arranged on the supporting base and is located on one side of the through hole; the telescopic assembly comprises a telescopic driving element, a telescopic rod and a baffle; one end of the telescopic rod is connected with the driving end of the telescopic driving element; the other end of the telescopic rod is fixedly connected or detachably connected with the baffle; a control assembly is electrically connected with the lifting assembly and the telescopic assembly.

2. The vertically movable tunnel furnace according to claim 1, characterized in that The lifting driving element is a hydraulic pump; the lifting piece comprises a hydraulic cylinder and a piston; the hydraulic cylinder is connected with the driving end of the hydraulic pump; the piston is arranged in the hydraulic cylinder; the top of the piston is threadedly connected with the bottom surface connecting element of the upper cover; the hydraulic pump drives the piston to move up and down in the hydraulic cylinder, thereby driving the upper cover to move up and down.

3. The vertically movable tunnel furnace according to claim 1, characterized in that The lifting driving element is a servo motor; the lifting piece comprises a screw rod and a nut seat; the nut seat is arranged on the screw rod; the screw rod is connected with the driving end of the lifting driving element; the nut seat is fixed with the bottom surface of the upper cover through a connecting element; the screw rod is driven to rotate by the servo motor, so that the nut seat moves linearly on the screw rod, thereby driving the upper cover to move up and down.

4. The vertically movable tunnel furnace according to claim 1, characterized in that The lifting driving element is a double-acting cylinder; the lifting piece is a piston rod; the piston rod is fixed with the bottom surface of the upper cover through a flange.

5. The vertically movable tunnel furnace according to claim 1, characterized in that The lifting assembly further comprises a linear guide rail and a sliding block; the linear guide rail is arranged on the inner wall of the cavity of the body; the upper cover is slidably connected with the linear guide rail through the sliding block.

6. The vertically movable tunnel furnace according to claim 1, characterized in that Limit switches are arranged on the top of the body and the bottom of the upper cover; proximity switches are arranged near the through hole of the supporting base; the limit switches and the proximity switches are electrically connected with the control assembly.

7. The vertically movable tunnel furnace according to claim 1, characterized in that A supporting sheath is arranged between the vertical guide through slot and the supporting guide column.

8. The vertically movable tunnel furnace according to claim 1, characterized in that When the upper cover moves to a preset position, a matched supporting shell is further arranged on the part of the supporting guide column which extends out of the guide through slot; the supporting shell is obtained by fastening two supporting half shells with fasteners.

9. The vertically movable tunnel furnace according to claim 1, characterized in that The upper cover is provided with a heating assembly; the body is provided with a conveying assembly; the heating assembly and the conveying assembly are electrically connected with the control assembly.

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